Bonavita, V.

study disease control creutzfeldt-jakob disease exposure patient consumption analysis creutzfeldt-jakob animal history association factor product finding risk factors italy evidence university lancet frequency transmission group dementia data collection table children growth case-control studies netherland family history health brain blood increase department germany spongiform encephalopathy animal products spongiform france analyses data analysis iatrogenic transmission surgery case-control prnp mutations iatrogenic person hospital family embryo mutation leather milk products animal exposure collection onset i zerr neurology leather products population period fertiliser power study group prion protein gene federico ii university research salpetri ère paris blood transfusion 405 controls codon 129 alp érovitch interpretation duijn hofman wientjen regard transfusion